Brake Shoe: Service and Repair

Rear Brake Shoe Replacement

CAUTION
Frequent inhalation of brake shoe dust, regardless of material composition, could be hazardous to your health.
- Avoid breathing dust particles.
- Never use an air hose or brush to clean brake assemblies. Use an OSHA-approved vacuum cleaner.



Disassembly

1. Raise and support the vehicle Service and Repair.

2. Remove the rear wheels.

3. Release the parking brake, and remove the brake drum.

4. Remove the tension pins (A) by pushing the respective retainer spring (B) and turning the pin.






5. Remove the lower return spring (A), and remove the brake shoe assembly over the hub.





6. Remove the forward brake shoe (B) by removing the upper return spring (C), and disassemble the brake shoe assembly.

7. Remove the rearward brake shoe (D) by disconnecting the parking brake cable from the parking brake lever (E).

8. Remove the U-clip (A), the wave washer (B), and the pivot pin (C), and separate the parking brake lever (D) from the brake shoe (E).






Reassembly

1. Apply Molykote 44MA grease to the sliding surface of the pivot pin (A) and the parking brake lever (B) for the rearward brake shoe (C).





2. Install the parking brake lever and the wave washer (D) on the pivot pin, and secure with a new U-clip (E).

NOTE: Pinch the U-clip securely to prevent the parking brake lever from coming out of the brake shoe.

3. Connect the parking brake cable to the parking brake lever.

4. Apply a thin coat of Molykote 44MA grease to the connecting rod ends (A) and the sliding surfaces (B) as shown. Wipe off any excess. Keep grease off the brake linings.






5. Apply a thin coat of Molykote 44MA grease to the shoe ends (A) and the edge of the shoe surfaces (B) that contact the backing plate as shown. Wipe off any excess. Keep grease off the brake linings.






6. Install connecting rods A and B on the adjuster bolt (C).

NOTE:

- Clean the threaded portions of connecting rod A and the sliding surface of connecting rod B, then coat them with Molykote 44MA grease.
- Shorten connecting rod A by fully turning in the adjuster bolt.





7. Assemble the brake shoes with the upper return spring (D), and with the connecting rods and the adjuster bolt onto the backing plate. Reconnect the parking brake cable to the parking brake lever (E), then install the self-adjuster lever (F) and the self-adjuster spring (G) on the forward brake shoe (H).

8. Install the tension pins (A) and the retainer springs (B) by pushing in the respective spring and turning each pin.






9. Install the lower return spring.

NOTE: Make sure the brake shoes are positioned on the brake shoe bosses on the backing plate, and the fittings on the top of the brake shoes are fitted into the wheel cylinder pistons.

10. Install the brake drum.

NOTE: Before installing the brake drum, clean the mating surface between the rear hub and the inside of the brake drum.

11. Clean the mating surfaces between the brake drum and the inside of the wheel, then install the rear wheels.

12. Press the brake pedal several times to make sure the brakes work and to set the self-adjusting brake.

NOTE: Engagement of the brakes may require a greater pedal stroke immediately after the brake shoes have been replaced. Several applications of the brake pedal will restore the normal pedal stroke.

13. Do the parking brake adjustment.